Windows Movie Maker allows adding of custom transitions, effects, and titles through a coding language known as XML (extensible mark-up language) and by then adding your codes to a folder named 'AddOnTFX' which you must create manually in the folder Movie Maker was installed in, usually located at C:/Program Files/Movie Maker/. If you haven't had expirience with XML coding before, you should probably get the feeling of the syntax and how it works by searching XML in google. Look around here at the forums at different XML codes, and if you are curious about a certain one or many, just post a question about how them. Look at this resources page for links that may assist you on creating your own and links to the documentation on creating them. If you create some neat ones be sure to share them here at the forums in the Share Your XP Transitions and Effects or Share Your Vista Transitions and Effects forums and other users may benefit from them.

MrJolteon - This has been attempted many times and there is no easy way to make a reverse XML. Infact, it wouldn't be able to be done through XML, you probably would have to code and create it from scratch and make your own Movie Maker plugin. Rehan describes a way to do it free using other software here.

Oh, well then you will have to wait for the next version of XML Adder which lets you change the location of your AddOnTFX folder. Sorry about that. The new version will be coming out soon, I am testing it out and fixing bugs.

No, we have to thank you for all that good work Fishy. Putting all of this together must have been like trying to herd cats running in different directions. So many custom xml's from many locations, some right, and some wrong to start with, and you got them organized. Lots of people were helped and likely were proud of themselves for the new accomplishment of installing and using computer code.